Samsung VP-A12, Service Manual

Page: 63 / 163

Alignment and adjustment
5-24 Samsung Electronics
3. Y/C Separation (Video block)
1) Rec, 100% color bar signal.
2) Pin 2 of IC201 and VR301, EVR.
3) Confirm the Ò3. Y/C SEPÓ mode by pressing the
ÒSTILLÓ (MODE CHANGE) button of remote
control.
4) Connect an oscilloscope to pin 2 of IC201.
5) Adjust VR301 to minimize the residual chroma
component.
6) Press the ÒREW (DATA DOWN)/F.F (DATA UP)Ó
button so that the pin 2 of IC201 minimize the
residual chroma component.
7) Adjust VR301 to minimize the residual chroma
component.
8) Be sure to Press the ÒSTART/STOP (CONFIRM)Ó
button on remote control to memorize setting.
MINIMAZE
2. Y-EMPHASIS (Video block)
1) Rec, 100% color bar signal.
2) TP202 and EVR.
3) Confirm the Ò2. Y-EMPHASISÓ mode by pressing
the ÒSTILLÓ (MODE CHANGE) button of remote
control.
4) Connect an oscilloscope to TP202.
5) Press the ÒREW (DATA DOWN)/F.F (DATA UP)Ó
button so that the TP202 is 0.5 ± 0.02Vp-p
from SYNC tip to peak level.
6) Be sure to Press the ÒSTART/STOP (CONFIRM)Ó
button on remote control to memorize setting.
0.5 0.02Vp-p
1. AGC (Video block)
1) Rec, 100% color bar signal.
2) TP201 and EVR.
3) Confirm the Ò1. AGCÓ mode by pressing the
ÒSTILLÓ (MODE CHANGE) button of remote
control.
4) Connect an oscilloscope to TP201.
5) Press the ÒREW (DATA DOWN)/F.F (DATA UP)Ó
button so that the TP201 is 0.5 ± 0.02Vp-p
from SYNC tip to peak level.
6) Be sure to press the ÒSTART/STOP (CONFIRM)Ó
button on remote control to memorize setting.
0.5 0.05Vp-p
4. CHROMA EMP (Video block)
Ò4. CHROMA EMPÓ Adjustment is fixed to EVR
data A2.
5. Y-FM Carrier Frequency (Video block)
1) Rec, no signal input
2) TP203 and EVR
3) Confirm the Ò5. CARRIERÓ mode by pressing the
ÒSTILLÓ (MODE CHANGE) button of remote
control.
4) Connect frequency counter probe to TP203.
5) Press the ÒREW (DATA DOWN)/F.F (DATA UP)Ó
button so that the TP203 is 4.38 ± 0.02MHz.
6) Be sure to Press the ÒSTART/STOP (CONFIRM)Ó
button on remote control to memorize setting.